为 了研 究无 粘 结 预 应 力碳 纤 维增 强 复合 材 料 (CFRP)筋 锚 具 的锚 固性 能 和 无 粘 结预 应 力
CFRP筋 混凝 土梁 的受力 性能 ,进 行 了 4根 无 粘 结预 应 力 CFRP筋 混凝 土梁 和 2根 对 比 混凝 土 粱
的抗 弯试验 。结果 表 明 :研发 的预 应 力 CFRP筋锚 具 具 有很 好 的 可靠 性 ,无 粘 结预 应 力 CFRP筋
混凝 土梁具 有较好 的 受力性 能和延 性 ,非预应 力钢 筋是 影 响预应 力 CFRP筋 混凝 土梁 延性 和 极 限
荷 载 最重要 的 因素 ;推 导 的 简化 公 式 可 以 准 确 地 计 算 无 粘 结 预 应 力 CFRP 筋 混 凝 土 梁 的极 限
荷 载 。
关 键词 :碳 纤维增 强复合 材料 筋 ;预 应 力混凝 土 梁 ;极 限荷 载 ;延 性 系数
中图分 类号 :TU378.8 文献标 志码 :A
Experiment on Flexural Behavior of Prestressed Concrete
Beams with Unbonded CFRP Tendons
W ANG Zuo—hu ,ZHAN Jie—dong。,DU Xiu—li。
(1.School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,
Beijing 100044,China;2.School of Civil Engineering and Architecture,Northeast Petroleum University,
Daqing 163318,Heilongjiang,China;3.Key Laboratory of Urban Security and Disaster Engineering of
Ministry of Education,Beijing University of Technology,Beijing 100124,China)
Abstract: In order to study the anchoring capacities and mechanical behavior of prestressed
concrete beams with carbon fiber reinforced polymer(CFRP)tendons。the flexural experiment of
four prestressed concrete beams with unbonded CFRP tendons and two comparative concrete
beam s were carried out. The results show that the anchorage efficiency coefficients of anchor
assembly are excellent。and the mechanical behavior and ductility of prestressed concrete beams
with unbonded CFRP tendons are good. Non—prestressed reinforcem ent is the m ost im portant
factor on the ductility and ultimate load of the prestressed concrete beams with CFRP tendons.
The calculated results of ultimate load based on the sim plified formulae for prestressed concrete
beam s with unbonded CFRP tendons are accurate.
Key words:CFRP tendon;prestressed concrete beam ;ultim ate load;ductility factor
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